Stem for bicycle handlebars



FIG. 1 is a front elevation view of a stem for bicycle handlebarsshowing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a top rear perspective view therof.

The ornamental design for a stem for bicycle handlebars, as shown.